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closure_table

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Closure Table for Elixir - a simple solution for storing and manipulating complex hierarchies.

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closure_table examples ct_ecto lib ct author.ex
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examples/ct_ecto/lib/ct/author.ex 

defmodule CT.Author do

  use Ecto.Schema

  import Ecto.Changeset



  @timestamps_opts [type: :utc_datetime]



  schema "authors" do

    field :name, :string

    has_many :comments, CT.Comment, on_replace: :delete



    timestamps()

  end



  def changeset(author, params \\ %{}) do

    author

    |> cast(params, [:name, :inserted_at])

    |> validate_required(:name)

    |> unique_constraint(:name)

  end

end